InfoWorld's Tom Yager writes in favor of Unix in IT, which has been increasingly losing ground to Linux. "Unix matters for a reason that escapes analysts' notice," Yager writes. "It's that little circle with the R in it." Asking whether IT would rather have a vendor's promise to interoperate with competitors' systems, or a contract obliging them to, Yager stresses the importance of The Open Group's registered trademark of the Unix 03 spec. "The trademark provides IT organizations that need to be sure, without need for digging, that Unix means something, and it does. It means that Unix enterprise solutions work and work together, without regard for the brand on the hardware" -- a guarantee of interoperability that is the "product of cooperation among Unix vendors, IT operations, universities, and professional organizations."